It’s easy to think of commercial products as black boxes, built with proprietary hardware that’s locked down from the factory. However, that’s not always the case. A great many companies are now turning out commercial products that rely on the very same microcontrollers that hackers and makers use on the regular, making them far more accessible for the end user to peek inside and poke around a bit.
Jim Scarletta has been doing just that with a wide variety of off-the-shelf gear. He came down to the 2024 Hackaday Superconference to tell us all about how you can repurpose ESP32-based commercial products.
The Jye Tech DSO-150 is a capable compact scope that you can purchase as a kit. If you’re really feeling the DIY ethos, you can go even further, too, and kit your scope out with the latest open source firmware.
The Open-DSO-150 firmware is a complete rewrite from the ground up, and packs the scope with lots of neat features. You get one analog or three digital channels, and triggers are configurable for rising, falling, or both edges on all signals. There is also a voltmeter mode, serial data dump feature, and a signal statistics display for broader analysis.
As you might have guessed, this isn’t exactly a hack out of necessity. With a flair for explaining hardware hacking, [wrongbaud] has put this together as a practical “brush-up” (get it?) on the tools and concepts involved in reverse engineering. In this case, the Raspberry Pi is used as a sort of hardware hacking multi-tool, which should make it relatively easy to follow along.
Modified image data on the SPI flash chip.
The first post in the series goes over getting the Pi up and running, which includes setting up OpenOCD. From there, [wrongbaud] actually cracks the toothbrush open and starts identifying interesting components, which pretty quickly leads to the discovery of a debug serial port. The next step is harassing the SPI flash chip on the board to extract its contents. As the toothbrush has a high-res color display (of course it does), it turns out this chip holds the images which indicate the various modes of operation. He’s eventually able to determine how the images are stored, inject new graphics data, and write it back to the chip.
Being able to display the Wrencher logo on our toothbrush would already be a win in our book, but [wrongbaud] isn’t done yet. For the last series in the post, he shows how to extract the actual firmware from the microcontroller using OpenOCD. This includes how to analyze the image, modify it, and eventually flash the new version back to the hardware — using that debug port discovered earlier to confirm the patched code is running as expected.
“The brickings will continue until the printer sales improve!” This whole printer-bricking thing seems to be getting out of hand with the news this week that a firmware update caused certain HP printers to go into permanent paper-saver mode. The update was sent to LaserJet MFP M232-M237 models (opens printer menu; checks print queue name; “Phew!) on March 4, and was listed as covering a few “general improvements and bug fixes,” none of which seem very critical. Still, some users reported not being able to print at all after the update, with an error message suggesting printing was being blocked thanks to non-OEM toner. This sounds somewhat similar to the bricked Brother printers we reported on last week (third paragraph).
It’s been a busy week in space news, and very little of it was good. We’ll start with the one winner of the week, Firefly’s Blue Ghost Mission 1, which landed successfully on the Moon’s surface on March 2. The lander is part of NASA’s Commercial Lunar Payload Services program and carries ten scientific payloads, including a GPS/GNSS receiver that successfully tracked signals from Earth-orbiting satellites. All of the scientific payloads have completed their missions, which is good because the lander isn’t designed to withstand the long, cold lunar night only a few days away. The landing makes Firefly the first commercial outfit to successfully soft-land something on the Moon, and being the first at anything is always a big deal.
Bambu Labs have been in the news lately. Not because of the machines themselves, but because they are proposing a firmware change that many in our community find restricts their freedom to use their own devices.
What can be done? [Joshua Wise] gave a standout talk on the Design Lab stage at the 2024 Hackaday Superconference where he told the tale of his custom firmware for the Bambu X1 Carbon. He wasn’t alone here; the X1 Plus tale involves a community of hackers working on opening up the printer, but it’s also a tale that hasn’t ended yet. Bambu is striking back. Continue reading “Supercon 2024: Joshua Wise Hacks The Bambu X1 Carbon”→
Although ham radio can be an engaging, rewarding hobby, it does have a certain reputation for being popular among those who would fit in well at gated Florida communities where the preferred mode of transportation is the golf cart. For radio manufacturers this can be a boon, as this group tends to have a lot of money and not demand many new features in their technology. But for those of us who skew a bit younger, there are a few radios with custom firmware available that can add a lot of extra capabilities.
The new firmware is developed by [NicSure] for the Tidradio TD-H3 and TD-H8 models and also includes a browser-based utility for flashing it to the radio without having to install any other utilities. Once installed, users of these handheld radios will get extras like an improved S-meter and detection and display of CTCSS tones for repeater usage. There’s also a programmer available that allows the radio’s memory channels to be programmed easily from a computer and a remote terminal of sorts that allows the radio to be operated from the computer.
One of the latest firmware upgrades also includes a feature called Ultra Graph which is a live display of the activity on a selected frequency viewable on a computer screen. With a radio like this and its upgraded firmware, a lot of the capabilities of radios that sell for hundreds of dollars more can be used on a much more inexpensive handheld. All of this is possible thanks to an on-board USB-C interface which is another feature surprisingly resisted by other manufacturers even just for charging the batteries.
